Analytical and Finite Element Methods for Studying the Influence of the Air-Coupled Transducer Characteristics on the Purity of Guided Waves Generated in Solids
Abstract
The measured efficiency of air-coupled transducers allows for the prediction of the absolute values of the pressure produced by bulk waves generated in air. In this paper, the propagation in air is simulated by an analytical model, which predicts the spatial distribution of the acoustic field. Knowing the efficiency of the transmitter, it is straightforward to compute the pressure field that is incident on a structure. Then this quantity is applied as boundaries conditions in the F.E model. The distance away from the transducer to the plate is investigated as a way to optimize the purity of the plate wave modes generation.
- Publication:
-
Review of Progress in Quantitative Nondestructive Evaluation Volume 29
- Pub Date:
- February 2010
- DOI:
- 10.1063/1.3362155
- Bibcode:
- 2010AIPC.1211.1061M
- Keywords:
-
- acoustic transducers;
- ultrasonic waves;
- partial differential equations;
- viscoelasticity;
- matrix algebra;
- 43.38.+n;
- 43.35.Zc;
- 02.30.Jr;
- 46.35.+z;
- 02.10.Yn;
- Transduction;
- acoustical devices for the generation and reproduction of sound;
- Use of ultrasonics in nondestructive testing industrial processes and industrial products;
- Partial differential equations;
- Viscoelasticity plasticity viscoplasticity;
- Matrix theory